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AQS Codes and Descriptions

Unless indicated otherwise, links on this page are to Excel spreadsheets created with Discoverer.

*Agency Codes are unique to the agency within AQS.  If an agency you need already exists, but is not shown for your state, contact NADG to have your state added to the list of states that can use that agency code.

**All parameter codes used by AQS do not have CAS numbers.  This table lists only those with CAS numbers.

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